By Peter Lowenstein | 2026-09-12
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On 09/13/2026 10:27 am by Patricio Leon | Santiago, Chile
The pair of sunspots AR4527 and 4528 are approaching the western limb to exit the solar face and no replacement is seen behind them. A central coronal hole has appeared in the northern hemisphere but solar wind speed has not been affected yet.
Newt 4.5" + solar film, 1/640s ISO100
crop, b/c
